Planohimph co



R. FITZ POWER.

SIGNALING DEVICE. APPLICATION Huap APR. 9. 1913.

Patented Aug. 5,1919.

2 SHEETS-SHEET I.

R. FITZ POWER.

SIGNALING DEVICE- APPLICATION FILED APILQ. 1918.

Patented Aug. 5, 1919;

2 SHEETSSHEET 2.

THE COLUMBIA PLANOKXRAPH cm, WASHINGTON. I). C.

i 3' "with ahother clock code diagram;

us d

UNITED STATES PATEN .QFFICE ynrcn hnari'rz roweithor fnojrnitrneefi nenhiin l -ge m n l a Be it known that I, RICH RD FiTZPOiVER, a subject of thefKing' of] Great Britain, residing at Doveridge, in, the county of Derby, l lngland, have invented certai'nl new and usefnl proifements 1SignalingDeyicesQdf which the following isaspecific'aticn.

jt ne-T he ar Wh t h ortesre 'ds i he code to. the center of the clocliface,

usually termed the 1K? Peir iti The object of his nyentionfis tc proyidea transparent plate which will automatically set itself, either for use with a rang ng sector as nowinnse by battery officers, or ether fuses in which a clock code disk may he emoyed requiring. its 12 -6 o"cloc'k line to be set'northand south.

Usually such clock code devices take the form of a celluloid diskwith hourllines marked on it, and circles, aecordingl'to the scale of the map in use,and itis necessaryto adjust this clock face when used on a so that the l2'6 oclock line is; arallel ith the true north and south line [o the"mapb f This invention consists in constr uctin gya clock code-face in the formlbf a transparent disk or'plate Weighted so that,; whe flg pended .about a central p ijvoij jfhe oclock line will "always swlng to e position at right angles to the olcl'ock line when horizontal." y i a In the drawings annexed to th s specification,

Figure 1 shows the weighted he; marked with a @1061; code. diagram standard eharactery" l, a F ig.2 illustrates a pivot piii as used with pthe'saiddisk;

Fig." 4, shows a methcd of using h disk thh lihhti hiea h iie,191s. sa-m nut ae? Referring first tmFigsl iflahd e, a is a transparentdisk of cellu loid, Or other suittiablelmaterial, marked with a standard clock code lthagram, and provided with an extensioh cpposite 6 floclock point ,which earif 1 therefore a pivot pin 0 1s passed threw the centeii of the disk a intd a Vertical support 03, the disk, owing to the action of gravity on the weight b, will swingfinto finahpositiori with the 12-6 cclock"line ertical. *When therefore the piirotlc isstnckiii" an ordinary map, say, for "example, at aYtar'get at which a gun is being aimed; any point sehtin by an obserizer workin gonthe clock code systemmay be immediately located on a map (vertical) 1withregardto thetargetwithout having to set an ordinary clock' code disk specially for that point, aiidwitliciitdrawing a clock code diagram are ind the said target as is someimes; done this facility of setting applies to fany point en the vertically supported map, since the weight b I automatically; insuresthe correct setting of the disk with regard to anypoint. l

I With reference to? Fig; 2, c is the pivot pin; e is asleeve, threaded atfone end, and f -is=a-1ehghmt witha milled, or otherwise serwrated, surface for ease in handling, which is screwed on to the endof and gripsa thiinble eye jybetween itself and the Wall d, thereby forming a firmhearing for the center" of the dislra'; thQf-llillflblQ lSIDaClB WltlI sufficient clearance to allow of a second member Z (hereinafter described) the disk a he binding effect on the latter; thin flanges "preferablybeing usedat the center ofthe disk d, "the inner one serving to separate the main surfaces of the members a and 1m tween the end of thehead-h andthenut fto keepthe partssiilig against the wall. l Referring to Fig: 3, k 1 represents part of l 'in'dicatesa inap which ispinnedon the support ZJ The spring 9 is provided bean ordinary map, and an ordinary tran's- -pa1ent ra gihg sector, I both as fused Joy; batt'e'ry officers at the present time, except that "forflusej with thisinvention the sector l has thdsloto cut 'alcngits herolinei The sector sl1ewn;;ismarked" with range circles from i 4,000 to 10 ,000 yards (shorter and longer {ranges may heTrnairlrecl) to ascale correspending tdthat of the map 70, and also with (radii emanatingffrom a point m about Which the s'ector"is pivoted; and which represents,

thereonbeingpinned to a vertical wall, the

sector Z; pivoted about-thegun position m is moved until its zero line passes through t, at

Which point the pivot c of the disk d is also passed through the .slot 0 and vthe point t on .the mapinto thew'alld.

Being free; on its pivot the 12*6. .oclock line-one immediately moves to-theverticaI position:which-according to: the clock code .indicates the north south line. It Will -readily-be seen thatsupposing. an aerialobserver sends ecto thejbattery 3 oflicers dug-out (say,

- fbyi; wireless) that a, shell has burst atthe po nt 17,2. e;,"at E 5, by clock code, :it-igsim- -mediately apparent to theiofficerthatthe coincident-point on the sector'beneath, in terms of ra ean di e q r ugh y 10 (yards .QVQr-and 3 to -the right ofthe target, which I is thecorrection ihe would .send tothe' bat- :tel' I firipractice the 1 sector, isaccurately. gsubdivided, the sub-divisions being; omitted fromjthe drawingfor the sake of clearness. Eor nearer; targets, of course, the ,disk a ;:;is' inserted at. a different spot-,1 for instance as shown (-dotted) at g fora range of 4,700 yards. By this means, when a map-is fixed lbfrlganrupright wall. with its north and south line from the top to thebottom lofthe; map, {if the clock code disk beattached to the imap by a; pivot; pin through its ,center, the 12'-6 .o c10ck -line ,Will always be parallel-withthe north and south line jwithoutany adjustment, and if the pin is placed: in the map where the target" is {represented,; the clock; code face is instantly in position for translating. clock code ;signals with reference to such; target whatever may bathedirection; from: which the guns are fired. 7

- It m be ders od-tha ,.:t ug e.- ferred to! herein as a disk, which; is theordinary form, the clocks-code face; :may ;be a weighted plate iot any other shape that is found convenient. i r 2Theicomin n r -0f a-what eIye-Ming t method, if interested, ;i nay ascertain the-enact 1 P s 011 I the --gr01 n f eachzs ot repor ed by the;-observer,by -noting thegpoint --,on

thesmap covered by theclock-code-intersec- ..tion:signal'ed.

\ -,,Withi-regard toathe aise; cfthe; term fyertic'al. in this; connection, itshould be nden :..stoodI-that, this zmay heljapproximateas-rel-gardsgthe facti'that: the wall; upon whichlthe rmap is'inwntedm yi-be onlyappm im e y vent cal, .andithat the;12: 6 jdclock:\linegwill atake, aeposition:at righttangle's to a; her ontal-line: through the lee-3 o -Cl'ocklinefiwhi h sis theiuposition which his :requijr'ed ,ikalth'ough etheecsaid1supporti'ng; wall forthe rmap, and,

consequently, the 12-6 oclock line of the clock face, may be some small amount out tween the map and disk surfaces.

-It*must be understood that the-Wei hted l-clockcode disk may be used with a vantage in any case Where it is necessary to have the 126 oclock line located truenorth and s0uth-withregard to the north and south "line of amp by simply hanging such .map on an upright wall, Whenthe 126 oclock line immediately takes a parallel direction with thenorth' and south line by, swinging intothe vertical position about its pivot, the map' of course being of ordinary character withvits north to south line parallel with the vertical side of the map. For instance, the Weighted clock code diskmay be used as shown in Fig. 4c, for indicating the position of shots fired ata secondary target such as 8 located atsome distance from the primary target If at, the center of a clock code diaei m r The ordinary clock code diagram is marked onthe instructors board (Vertical) andias before, the transparent weighted disk a is superimposed over the primary diagram n,'b o thbeing in the vertical position; if 'now the'instructorhaving indicated to the pupil thatthesecondary target is at ssay, some prominent feature on the instruction map-and. then by means of the operating arm of the instruction apparatus he shows a [shell-burst. at r, i. e.,at E 3 ontheprimary diagram, he can see at once that the readin .on the secondary-disk a is approximately g at half past one, and this is the position the pupil isbeing instructed to estimate by ,means of anyaknown method of artillery observation;

'It should be noted that the disk when not innluse remains preferablyattached tothe se'c tor, which always hangs from the pin in the ,battery'--position. Also that means are provided-,lin connection withthe pivot pin, -for insuringclose contact between the wall and the map,-,'Y the. map and sector, and the s ctor and disk.

It will be seen, therefore, that the inventionofi'ers a-Ixvery expeditious-and certain method of translating positions according to one system into thoselof another system, and is especially useful in connection with aerial '-.Qb Y%i0 .What I claim as newgand useful and of my own invention, and desire to secure by -[I Jetters;Patent, is I 1. The combination, in a devicefor transgglatingsignals-from one system to another, of a transparent; plate having positionfidentification lines marked thereon of pnedetercorrespond; tel-a5 north to-,south, line, and a weight attached to the said plate opposite one end of the said north to south line, for the purpose set forth.

2. In a device of the class described, the combination of a transparent plate marked with position identification lines of predetermined scale one of which lines corresponds to a north to south line, a pivot adapted to support the said plate so that it will swin freely in a substantially vertical plane, an a weight attached to the said plate whereby the line corresponding to north to south is constrained to take a vertical position. v

3. In a device of the class described, the combination of a transparent disk marked with position identification lines in the form of a clock code diagram with radial lines indicating the hour number positions, a pivot freely supporting the said disk in a substantially vertical plane, and a weight attached to the said disk opposite the lower end of the 126 oclock diameter.

4. In a device of the class described, the combination of a transparent disk marked with position identification lines of predetermined scale one of which lines corresponds to a north to south line, a weight attached to the said plate opposite the lower end of the said north to south line, a pivot pin adapted to freely carry the said disk on a substantially vertical support, the said pin having a flanged and threaded sleeve, and a threaded nut engaging same, a spring disposed between the head of the pin and the said nut, and a thimble eye disposed between the other end of the nut and the flange of the said sleeve, all substantially as and for the purpose set forth.

5. In a device for translating a point on a secondary system of identification lines into terms indicating a co-incident point on a ranging sector provided with radial lines one of which is a zero line, the combination with a ranging sector having a longitudinal slot corresponding to its zero line, oi a transparent plate carrying a secondary system of identification lines marked to the same scale as the said ranging sector, a line of the said system corresponding to a north-south line,

1 with radial lines one of which is a zero line and having a longitudinal slot corresponding with its zero line, of a transparent disk marked with position identification lines in the form of a clock code diagram to the same scale as that of the sector, and having radial "lines indicating the hour number positions, a weight attached to the said disk opposite the lower end of the 126 oclock diameter, a substantially horizontal pivot pin passing through the point of origin of the sector lines, a substantially horizontal pivot pin passing through the center of the clockcode diagram and through the zero line slot of the sector, the said latter pin having a flange and threaded sleeve and a threaded nut engaging same, a spring disposed between the head of the said latter pin and the said nut, and a thimble eye disposed between the other end of the nut and the flange of the said sleeve and freely supportiing1 the ranging sector and the clock code In testimony whereof I aifix my signature.

RICHARD FITZ POWER.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents, Washington, D. G. 

